The law and science approach the question differently.
. But she lived in Portland, near where the protests happened and where police officers regularly fired off canisters of tear gas. Gas doesn’t stay confined to one area — it spreads, and Vasquez says it spread into her home.
The lawsuit underscores the disconnect between how discoveries are made in court and in the lab, especially when the legal system is asked to handle a still-unsettled scientific question. Even if the lawsuit is successful — indicating that yes, cities can be held responsible for menstrual cycle disruptions after their police departments use tear gas — it doesn’t change the fact that medical researchers still aren’t able to conclusively say tear cause caused the changes.
But there hadn’t been solid academic research looking at the question of how tear gas exposure impacts menstrual cycles in people. So in the aftermath of the 2020 protests, Hassan and a group of colleagues set out to conduct a more rigorous analysis. To make matters more complicated, the exact components of tear gas are often murky, Hassan says. It’s considered proprietary information by companies, so scientists can’t untangle what chemicals specifically could be interacting with the body to produce the changes people are reporting.Despite the limited research to date, causation is what Fuller’s case is trying to prove. He’s arguing that exposure to tear gas was responsible for his client’s menstrual changes.
The gap between the evidence lawyers need and the evidence scientists need shows how differently each discipline tries to find answers. What convinces a jury doesn’t necessarily convince a scientist. And a jury agreeing that tear gas was responsible for menstrual changes would not be considered evidence for a causal link by researchers — they’d still have to run the experiments and pull the data.
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